JP2005108959A - Electronic component loading apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic component loading apparatus which can realize stable and highly accurate loading of electronic components which may easily generate a displacement in the loading when a holding pawl to hold the electronic component is provided. <P>SOLUTION: A loading head 7 or 8 moves onto a component supplying unit 16, stops at the taking location, then moves downward, and is then located at the position where a clamp pawl 27 in the opening condition can hold an electronic component 15. In this case, even when the electronic component 15 is in contact with a guide surface 58 formed to a component guide 55 of a guide member 56, the component is surely located between a pair of clamp pawls 27 while it is guided to the guide surface 58. In addition, the restricting portion 59 of the guide member 56 is in contact with the upper surface of the electronic component 15 located between both clamp pawls 27 to restrict the upper limit thereof. Next, evacuation of the vacuum path of the loading head 7 or 8 is turned on to attract a piston 43 within a vacuum hole 41. Accordingly, the clamp pawl 27 closes via a link 46. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electronic component automatic mounting apparatus in which a suction nozzle attached to a mounting head in a replaceable manner vacuum-sucks an electronic component and mounts the electronic component at a desired position on a printed board.

In this type of electronic component automatic mounting apparatus, the suction nozzle is attached to the mounting head in a replaceable manner so as to be compatible with various electronic components, and the suction nozzle is attached according to the type of the component. In such a case, depending on the type of electronic component, there are some that cannot be reliably removed by vacuum suction alone. Instead of a normal suction nozzle, a mechanical chuck that grips and holds the electronic component by closing a pair of gripping claws. May be used (see Patent Document 1).
JP 2000-124679 A

  However, when gripping with such a mechanical chuck, it may be tilted and gripped due to variations in the position of electronic components. In this case, the higher the height of the electronic component, the larger the positional deviation and the larger the mounting positional deviation.

  Therefore, an object of the present invention is to provide an electronic component mounting apparatus capable of stably and highly accurately mounting an electronic component that is likely to be displaced in the mounting position when a gripping claw for gripping the electronic component is provided.

  Therefore, according to a first aspect of the present invention, there is provided an electronic component automatic mounting apparatus in which a suction nozzle that is replaceably attached to a mounting head sucks an electronic component and mounts the electronic component at a desired position on a printed circuit board. A mechanical chuck that is provided with a pair of gripping claws for gripping the electronic component and is attached to the mounting head, and guides the electronic component to be positioned between the gripping claws when the mounting head is lowered. A pair of guide members provided with a pair of component guide portions provided at a narrower interval than the interval between the gripping claws at the time are provided in the mechanical chuck.

  According to a second aspect of the present invention, there is provided an electronic component automatic mounting apparatus in which a suction nozzle attached to the mounting head in a replaceable manner sucks the electronic component and mounts the electronic component at a desired position on the printed circuit board. A pair of gripping claws for gripping electronic components is provided, and a mechanical chuck is provided that is attached to the mounting head, and guides the electronic component to be positioned between the gripping claws when the mounting head is lowered. A pair of guide members each having a pair of component guide portions provided at a narrower interval than the interval between the gripping claws in the mechanical chuck are provided so as to face the outside of the gripping claws. To do.

  A third invention is characterized in that, in the first or second invention, each guide member is provided with a restricting portion that comes into contact with an upper surface of an electronic component held by the holding claws.

  According to a fourth invention, in the first or second invention, the pair of gripping claws slides on a straight line, opens and closes, and grips an electronic component.

  The present invention can provide an electronic component mounting apparatus capable of stable and high-precision mounting even for an electronic component in which mounting position deviation is likely to occur when a gripping claw for gripping the electronic component is provided.

  Embodiments of an electronic component mounting apparatus according to the present invention will be described below with reference to the drawings. In FIG. 7, a pair of rails 5 for guiding the movement of the A beam 3 and the B beam 4 in the Y direction are arranged on the base 2 of the electronic component automatic mounting apparatus 1. The A beam 3 and the B beam 4 are long in the X direction, and the mounting heads 7 and 8 are arranged to be movable along the longitudinal direction.

  Accordingly, the mounting heads 7 and 8 are movable in the XY directions. A ball screw shaft 11 rotated by the A side Y-axis motor 10 is screwed into a nut (not shown) fixed to the A beam 3, and the A beam 3 moves along the rail 5 by the rotation of the ball screw shaft 11. Is possible. Further, the B beam 4 moves along the rail 5 when the ball screw shaft 12 having the same structure is rotated by the B side Y axis motor 14.

  7 are respectively formed at positions above and below the base 2 in FIG. 7. In the component supply unit 9, a component supply unit 16 that is a component supply device that supplies various electronic components 15 is arranged in the X direction. Are installed side by side. In addition, as a component supply device, for example, a tray in which electronic components such as connectors are arranged in parallel may be provided in the component supply unit 9. The mounting heads 7 and 8 are for transporting and mounting the electronic component 15 taken out from the arbitrary component supply unit 16 by vacuum suction to a desired position on the printed circuit board 18.

  The printed circuit board 18 is transported by a transport conveyor 20 installed on the base 2, and the electronic components 15 are mounted by the mounting heads 7 and 8 in a state where the printed circuit board 18 is positioned and fixed by a fixing mechanism (not shown) at a predetermined position. After the electronic component 15 is mounted, it is conveyed to the downstream device.

  Then, the electronic component 15 taken out from the component supply unit 16 is recognized by the component recognition camera 21 to be displaced with respect to the mounting heads 7 and 8 before being mounted on the printed circuit board 18.

  Further, a nozzle stocker 22 is installed on the base 2, and a suction nozzle 24 attached to the mounting heads 7 and 8 in a replaceable manner is placed as shown in FIGS. 8 and 9. A mechanical chuck 25 can be attached to the mounting heads 7 and 8 instead of the suction nozzle 24. As shown in FIGS. 1 to 6, the mechanical chuck 25 opens and closes by a pair of clamp claws 27 sliding on a straight line perpendicular to the axis thereof.

  When the clamp claw 27 slides on a straight line and the claw swings as in this embodiment, the clearance between the clamp claw 27 having the same plate thickness from the open state to the claw, that is, the claw If the movement distance is made the same, the outer diameter becomes larger when the structure in which the claw swings is opened, so that it is more advantageous to slide it in the lateral direction as in this embodiment. In particular, when the electronic component 15 is accommodated in the recess of the storage tape, and the interval between the component 15 and the wall surface of the recess is small, the swinging claw is easy to be caught in an open state, which is disadvantageous.

  The fitting part 30 fitted to the mounting heads 7 and 8 on the upper part of the mechanical chuck 25 is formed in the same shape as the fitting part 31 fitted to the mounting heads 7 and 8 on the upper part of the suction nozzle 24, and instead of the suction nozzle 24. Further, the mechanical chuck 25 can be attached to the mounting heads 7 and 8. A diffusion plate 33 having the same shape as the diffusion plate 32 formed on the suction nozzle 24 is also formed on the mechanical chuck 25.

  The diffusion plates 32 and 33 are formed to have a size to be placed in the placement recess 35 of the stocker 22, and the cylindrical portion 37 of the suction nozzle 24 and the body portion 38 of the mechanical chuck 25 are located at the center of the placement recess 35. It is inserted into the hole 39 that opens to the top. That is, the diameter of the hole 39 is larger than the outer diameters of the cylindrical portion 37 and the body portion 38. The diameters of the holes 39 are the same in the stocker 22, and the mounting recesses 35 are also the same size, and the mechanical chuck 25 can be mounted in any of the mounting recesses 35. it can. Although not shown in FIG. 8, the nozzle stocker 22 is provided with a regulation claw 40 that engages with the upper portions of the diffusion plates 32 and 33 as shown in FIG. The restricting claw 40 opens and closes on the nozzle stocker 22 when the suction nozzle 24 is replaced so that the engagement can be released.

  Next, the opening / closing mechanism of the clamp claw 27 of the mechanical chuck 25 will be described with reference to FIGS. A vacuum hole 41 is opened in the axial direction of the mechanical chuck 25 at the upper portion of the fitting portion 30 formed in the mechanical chuck 25, and the piston 43 is configured to be able to reciprocate up and down in the vacuum hole 41. The vacuum hole 41 communicates with a vacuum passage (not shown) formed in the mounting heads 7 and 8. This vacuum passage (not shown) communicates with a vacuum source (not shown), and vacuum suction is turned on and off by opening and closing a valve (not shown). Similarly, when the suction nozzle 24 is attached, the electronic component 15 is sucked through the vacuum passage.

  One end of a link 46 swinging around a fulcrum 45 is engaged with a pin 44 projecting from the lower portion of the piston 43, and the other end of the link 46 is connected to a guide pin 48 projecting from a slider 47. Engage. A clamp pawl 27 is replaceably attached to the slider 47. Although not shown, the other clamp claw 27 is attached to the opposite side of FIGS. 10 and 11 via a link 46 and a slider 47 having the same structure.

  As shown in FIG. 12 and the like, the slider 47 is guided and slid by moving guide pins 48 projecting on both sides of the slider 47 through guide grooves 50 formed in the body portion 38. The slider 47 is formed with an extension 51 extending in the longitudinal direction of the guide groove 50, and the extension 51 is provided with a notch groove 52. The other guide pin 48 is inserted into one notch groove 52, and when one slider 47 moves, one guide pin 48 is guided to the guide groove 50 and also guided to the other notch groove 52. It will be.

  The clamp pawl 27 is attached to a mounting piece 53 protruding below the slider 47 by a screw 54 so as to be replaceable. As shown in FIG. 1 and the like, guide members 56 and 56 having a pair of component guide portions 55 are provided on the body portion 38 of the mechanical chuck 25 so as to be orthogonal to the clamp claws 27 outward of the pair of clamp claws 27. Then, they are attached and fixed through screws 57 so as to face each other. The guide members 56, 56 guide the electronic component 15 having a high height when the mounting heads 7, 8 are lowered so as to be surely positioned between the pair of clamp claws 27. A pair of component guide portions 55 provided with a narrower interval than the interval between the claws 27 is provided.

  Furthermore, each component guide portion 55 of each guide member 56 is formed with a guide surface 58 at the opposite lower end portion of the side surface. That is, a guide surface 58 that is cut out so as to expand downward is formed at the lower end of the opposite side surface, and the component guide portion 55 of the guide member 56 contacts the upper end of the electronic component 15 when the mounting heads 7 and 8 are lowered. Even if it contacts, the guide surface 58 guides the electronic component 15 so as to be surely positioned between the pair of component guide portions 55, that is, between the pair of clamp claws 27. Each guide member 56 is generally U-shaped in a side view, but a restricting portion 59 is formed at a portion where each component guide portion 55 is connected, and the restricting portion 59 of each guide member 56 is located between the clamp claws 27. It contacts the upper surface of the electronic component 15 positioned to regulate the upper limit and to keep the posture horizontal. Accordingly, since the restricting portions 59 and 59 of the both guide members 56 need to be in contact with the upper surface of the electronic component 15 to be regulated, the guide members 56 and 56 are at least longer than the length between both side surfaces of the electronic component 15 that are not gripped. The length between them (the shortest length) is longer.

  With the above configuration, the operation will be described below. First, the mounting head 7 or 8 moves from the nozzle stocker 22 onto the stocker 22 in order to attach the mechanical chuck 25. Then, the control claw 40 is opened by driving a drive source (not shown), and the mounting head 7 or 8 is lowered to attach the mechanical chuck 25.

  Next, when the automatic operation of the electronic component automatic mounting apparatus 1 is started, the mounting head 7 or 8 moves onto the component supply unit 16 and stops at the take-out position. Then, the mounting head 7 or 8 is lowered, and the mechanical chuck 25 is opened by a spring (not shown) as shown in FIGS. 3 to 5, and the clamp pawl 27 is positioned so that the electronic component 15 can be gripped. To position.

  In this case, as shown in FIG. 4, even when the mounting head 7 or 8 is lowered and the electronic component 15 contacts the guide surface 58 formed on the component guide portion 55 of the guide member 56, the guide surface 58 It will be surely positioned between the pair of clamp claws 27 while being guided by the guide. In addition, the restricting portion 59 of each guide member 56 abuts against the upper surface of the electronic component 15 positioned between the clamp claws 27 to restrict the upper limit (see FIG. 5) and to keep the posture horizontal.

  Next, the vacuum passage in the mounting head 7 or 8 is turned on by a valve (not shown), the piston 43 is vacuumed in the vacuum hole 41, and the clamp pawl 27 is closed via the link 46 as shown in FIG. .

  In this way, the mounting head 7 or 8 is lowered, and the gripping operation by each clamp claw 27 is performed in a state where the restricting portion 59 is in contact with the upper surface of the electronic component 15, and the component 15 is kept horizontal as much as possible. It is gripped. The timing of turning on the vacuum is the same as when the component 15 is sucked using the suction nozzle 24, and the electronic component mounting apparatus 1 can control the on / off of the vacuum without distinguishing between the suction nozzle 24 or the mechanical chuck 25.

  At this time, the swing of the link 46 causes the pair of sliders 47 to move from the state of FIG. 15 toward the center in the direction approaching the state of FIGS. 12 and 13. By moving in the guide groove 50, it slides and moves smoothly without being caught. The guide dimensions of the slide movement at this time are as shown in FIG.

  Next, the mounting head 7 or 8 holds and conveys the electronic component 15 as shown in FIG. 6, stops so that the suction position becomes the center of the screen of the component recognition camera 21, and the displacement of the electronic component 15 is shifted. Be recognized. At this time, light is irradiated to the lead wire portion of the component, and the reflected light is imaged by the camera 21. The diffusion plate 33 is appropriately darkened as the background.

  Next, the mounting head 7 or 8 is moved to a position where this positional deviation is corrected so that the center of the electronic component 15 is positioned at a position indicated by mounting data (not shown) on the printed circuit board 18. . At this time, if the angle of the electronic component 15 in the horizontal plane is designated, the angle of the head 7 or 8 is changed by an angle changing mechanism (not shown).

  Next, the electronic component 15 is mounted on the printed circuit board 18. That is, when mounting, the mounting head 7 or 8 is lowered, and the component 15 is regulated by the regulating part 59 and pressed against the substrate 18 while keeping the level, the vacuum of the vacuum hole 41 is turned off, and the air blow And both clamp claws 27 are opened. This air blow quickly breaks the vacuum, and is not a strong positive pressure but is blown out at the same timing as the suction nozzle. In this case, the pair of sliders 47 move away from each other due to the swing of the link 46, but the guide pins 48 move in the notch grooves 52 and the guide grooves 50, so that they do not get caught. It slides and moves smoothly.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various alternatives described above without departing from the spirit of the present invention. It includes modifications or variations.

It is a perspective view of a mechanical chuck. It is a perspective view from the bottom face direction of a mechanical chuck. It is a front view of the mechanical chuck of the state located above the electronic component. It is a front view of the mechanical chuck in a state where the mounting head is lowered and the electronic component is in contact with the guide surface formed on the component guide portion of the guide member. It is a front view of the mechanical chuck in a state where the mounting head is lowered and the electronic component is regulated by the regulating part of the guide member. It is a front view of a mechanical chuck in a state where an electronic component is gripped by a clamp claw. It is a top view of an electronic component automatic placement device. It is a side view of a nozzle stocker. It is a top view of a nozzle stocker. It is a front view which shows the opening / closing mechanism of the clamp nail | claw of a mechanical chuck, and is a figure which shows the state which the clamp nail | claw closed. It is a front view which shows the opening and closing mechanism of the clamp nail of a mechanical chuck, and is a partly broken view, and is a figure showing the state where a clamp nail was opened. It is a cross-sectional top view which shows the moving mechanism of the slider of a mechanical chuck, and is a figure which shows the closed state. It is a cross-sectional front view which shows the moving mechanism of the slider of a mechanical chuck, and is a figure which shows the closed state. It is a side view which fractures | ruptures a part which shows the moving mechanism of the slider of a mechanical chuck | zipper. It is a cross-sectional front view which shows the moving mechanism of the slider of a mechanical chuck, and is a figure which shows the open state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic component automatic mounting apparatus 7, 8 Mounting head 15 Electronic component 16 Component supply unit 18 Printed circuit board 22 Nozzle stocker 24 Adsorption nozzle 25 Mechanical chuck 27 Clamp claw (gripping claw)
47 Slider 55 Parts guide part 56 Guide member 58 Guide surface 59 Restriction part

Claims (4)

  In an electronic component automatic mounting apparatus in which a suction nozzle attached to the mounting head in a replaceable manner picks up an electronic component and mounts the electronic component at a desired position on a printed circuit board. And a mechanical chuck that is attached to the mounting head and that guides electronic components to be positioned between the gripping claws when the mounting head is lowered. An electronic component mounting apparatus, wherein a pair of guide members including a pair of component guide portions provided at narrower intervals are provided on the mechanical chuck.   In an electronic component automatic mounting apparatus in which a suction nozzle attached to the mounting head in a replaceable manner picks up an electronic component and mounts the electronic component at a desired position on a printed circuit board. And a mechanical chuck that is attached to the mounting head and that guides electronic components to be positioned between the gripping claws when the mounting head is lowered. An electronic component mounting apparatus, wherein a pair of guide members each having a pair of component guide portions provided at narrower intervals are provided on the mechanical chuck so as to face outward of the gripping claws.   The electronic component automatic mounting apparatus according to claim 1, wherein each guide member is provided with a restricting portion that comes into contact with an upper surface of the electronic component gripped by the gripping claws. 3. The electronic component automatic mounting apparatus according to claim 1, wherein the pair of gripping claws slides on a straight line to open and close to grip an electronic component.

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